"We have thousands of targets ahead," Israeli army spokesman Effie Defrin told US broadcaster CNN.
"We are ready, in co-ordination with our US allies, with plans through at least the Jewish holiday of Passover, about three weeks from now. And we have deeper plans for even three weeks beyond that," he added.
Passover, a key date in the Jewish religious calendar, starts on the evening of April 1 when families gather to mark the liberation of Jews from Egyptian slavery thousands of years ago.
The Israeli military reports that the air force has carried out more than 400 waves of strikes since renewed hostilities began on February 28, targeting Iranian infrastructure in particular.
Defrin told CNN that the Israeli military was "not working according to a stopwatch or a timetable but rather to achieve our goals".
The aim was to severely weaken the Iranian government, the brigadier general said.
Wright said on Sunday that he expects the US war with Iran to end within "the next few weeks," with oil supplies rebounding and energy costs declining afterwards.
"I think that this conflict will certainly come to the end in the next few weeks - could be sooner than that. But the conflict will come to the end in the next few weeks, and we'll see a rebound in supplies and a pushing down in prices after that," Wright told US broadcaster.
Meanwhile, Iranian Foreign Minister Abbas Araqchi said Iran will continue to defend itself from US and Israeli attacks until US President Donald Trump understands that there is no path to victory.
"We are ready to defend ourselves as long as it takes," Araqchi told CBS News.
He said they would "continue to do that until President Trump comes to the point that this is an illegal war with no victory".
Asked whether Iran had requested a pause in hostilities, he said: "No, we never asked for a ceasefire and we have never asked even for negotiation".
Trump told NBC News that Iran appeared ready to make a deal to end the fighting but that "the terms aren't good enough yet".
In his interview with NBC, Trump raised the possibility that Supreme Leader Mojtaba Khamenei may have been killed but Araqchi said Khamenei was in full health and managing the situation.
The war that has spread across the Middle East and killed more than 2000 people, most in Iran and Lebanon.
The US has brushed aside attempts by Middle Eastern allies to open talks between the United States and Iran, three sources told Reuters, and Iran's Revolutionary Guards said on Sunday they had fired more missiles at Israel and three US bases in the region.
with Reuters
